EP1438330A2 - Leurres peptidiques pour la preparation de medicaments destines a la prevention ou au traitement des pathologies auto-immunes, ou des troubles lies a l'apparition d'anticorps diriges contre des proteines exogenes - Google Patents
Leurres peptidiques pour la preparation de medicaments destines a la prevention ou au traitement des pathologies auto-immunes, ou des troubles lies a l'apparition d'anticorps diriges contre des proteines exogenesInfo
- Publication number
- EP1438330A2 EP1438330A2 EP20020802664 EP02802664A EP1438330A2 EP 1438330 A2 EP1438330 A2 EP 1438330A2 EP 20020802664 EP20020802664 EP 20020802664 EP 02802664 A EP02802664 A EP 02802664A EP 1438330 A2 EP1438330 A2 EP 1438330A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- seq
- lures
- peptide
- use according
- mimotopic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K7/00—Peptides having 5 to 20 amino acids in a fully defined sequence; Derivatives thereof
- C07K7/04—Linear peptides containing only normal peptide links
- C07K7/08—Linear peptides containing only normal peptide links having 12 to 20 amino acids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/04—Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/08—Plasma substitutes; Perfusion solutions; Dialytics or haemodialytics; Drugs for electrolytic or acid-base disorders, e.g. hypovolemic shock
Definitions
- the subject of the invention is peptide lures of pathogenic antibodies for the preparation of medicaments intended for the prevention or treatment of autoimmune pathologies, or disorders linked to the appearance of antibodies directed against exogenous recombinant or non-recombinant proteins. used in the context of the treatment of these autoimmune pathologies or pathologies requiring the administration to patients of said exogenous proteins.
- Hemophilia A is a (severe) pathology due to the absence or insufficiency of functional Vin factor (FN ⁇ i).
- the coagulation capacity is restored in patients by the administration of concentrates of recombinant factor VIII or derived from plasmas.
- the antibody response has the effect of inhibiting the procoagulant activity of the administered FNm and thus seriously complicating the treatment of these hemophiliacs.
- Antibodies are known to have a specialized molecular structure, called a paratope, which allows them to perform an important biological function: recognition of the antigen.
- the paratope of the antibody is able to recognize not only a limited part (called “epitope") of the antigen which was at the origin of its selection, but also smaller fragments of this antigen, in particular peptides corresponding to the epitope (called “epitopic peptides”), peptides having modifications of sequence or chemical structure compared to the epitope (called “epitope variants”) or molecules having no homology sequence with the antigen (called “mimotopes”).
- the antibody response against FVm is polyclonal and heterogeneous in its specificity [Gilles et al, 1993, Blood, 2452-61] but it has been observed that the regions recognized by the inhibitory antibodies (epitopes) are restricted to a few main areas of the Vin factor molecule.
- the A2 domain and the C2 domain were initially identified by immunoblotting methods using proteolytic fragments of FVII [Fulcher et al., 1985, PNAS USA 82, 7728-32] and subsequently confirmed when the nucleotide sequence of FVm has been determined (Vehar et al, 1984, Nature 312, 337-342; Gitschier et al., 1984, Nature 312, 326-336) and prepared recombinant fragments [Scandella et al., 1988, PNAS 86 (4), 1387; Scandella et al., 1989, Blood 74, 1618-26].
- the epitope of a murine monoclonal inhibitor antibody could be restricted to a sequence of 25 amino acids from the A2 region (residues 484-508) thanks to the clever use of hybrids between the
- the present invention follows from the demonstration by the Inventors, that peptides or pseudopeptides corresponding to variants of epitopes or to mimotopes, are capable of binding in the site of anti-FVIII antibodies, by preventing their binding to factor Vin, and thus reducing the anti-coagulant activity of this antibody.
- the object of the present invention is to provide new means for combating antibodies present in the body in the context of autoimmune pathologies, or pathologies requiring the administration of proteins to patients, making it possible to considerably limit the cost of therapeutics. in this area, with an efficiency comparable to or even superior to current treatment methods.
- the subject of the present invention is the use of peptide or pseudopeptide lures which bind to antibodies capable of developing against endogenous proteins in the context of autoimmune pathologies or against exogenous proteins administered to patients, in particular in the context of pathologies due to a deficiency in these proteins, the amino acid sequence of said peptide or pseudopeptide lures differing from that of the epitopes recognized by said antibodies, for the preparation of medicaments intended for the prevention or treatment of said autoimmune pathologies, or for the prevention or in the treatment of disorders linked to the appearance of antibodies directed against said exogenous proteins.
- a more particular subject of the invention is the aforementioned use of peptide or pseudopeptide lures defined above, comprising between approximately 6 and approximately 20 natural or unnatural amino acids (and preferably between approximately 8 and approximately 16 of these amino acids), said lures being selected for their ability to:
- the antibodies preferentially recognize the peptide or pseudopeptide decoys than the endogenous or exogenous proteins mentioned above.
- the invention also relates to the abovementioned use, of lures as defined above, for the preparation of medicaments intended for prevention or treatment:
- a more particular subject of the invention is the use of lures as defined above, for the preparation of medicaments intended for the prevention or treatment of disorders linked to the appearance of antibodies against the e ⁇ dogenic factor VIE, or against exogenous factor Vin or derivatives, recombinant or not, administered in the context of hemophilia A.
- the invention also relates to the aforementioned use of peptide lures defined above, as obtained from vectors expressing libraries of peptides.
- the invention more particularly relates to the aforementioned use of decoys having no homology, or even a weak homology of between approximately 10% and approximately 30%, with the epitopes of said proteins recognized by said antibodies, said decoys still being designated mimotopic lures.
- the invention relates more particularly to the aforementioned use of mimotopic decoys of factor VIE.
- a more particular subject of the invention is the aforementioned use of mimotopic decoys of factor VIE of formula (I) below:
- ni and n2 independently of one another represents 0 or 1,
- - X a represents a chain of 8 to 10 amino acids, natural or not.
- the invention relates more particularly to the aforementioned use of mimotopic lures defined above of formula (I) in which:
- - X] is chosen from Y, E, Q, S, R, A, K, N, or T,
- - X 2 is chosen from R, T, H, G, S, L, V, P, F, D, K, A, Q or I.
- a more particular subject of the invention is the aforementioned use of mimotopic lures defined above of formula (I) in which X a represents the following sequence: NPS I GDKN SEQ ID NO: l
- the invention also more particularly relates to the aforementioned use of the mimotopic lure of the following formula:
- the invention also relates to the aforementioned use of mimotopic decoys of formula (I) in which X a represents the sequence of following formula:
- - n3 represents 0 or 1
- - X 6 represents a hydrophobic amino acid.
- a more particular subject of the invention is the aforementioned use of mimotopic lures defined above of formula (I), characterized in that:
- - X 3 is chosen from I, Q, R, T, or K,
- - X 4 is chosen from V, T, L, I, M, F, W, or Y,
- - X 5 is chosen from F, or Y,
- - X 6 is chosen from A, M, Y, P, T, or V,
- the invention relates more particularly to the aforementioned use of mimotopic lures defined above of the following formulas:
- nl2 and nl3 independently of one another represent 0 or 1,
- - X to X 1 represent any amino acid
- a more particular subject of the invention is the aforementioned use of mimotopic lures defined above of formula (I), characterized in that:
- - X is chosen from H, S, T, M, Q, or G,
- - X 8 is chosen from T, A, K, R, Q, or E,
- - X is chosen from S, A, H, F, N, G, or T,
- - X 10 is chosen from R, K, L, S, H, T, I, or A,
- - X ⁇ is chosen from S, T, V, K, R, Y, M, or D,
- - X 12 is chosen from S, R, or L,
- - X 13 is chosen from I, H, or W.
- the invention more particularly relates to the aforementioned use of mimotopic lures defined above of formula (I) chosen from those of the following formulas:
- a more particular subject of the invention is also the above-mentioned use of the mimotopic lure of the following formula:
- the subject of the invention is also the aforementioned use of mimotopic lures of the following formula:
- nl4 and nl9 independently of one another represent 0 or 1,
- the invention relates more particularly to the aforementioned use of mimotopic lures defined above of formula (I), characterized in that:
- the invention more particularly relates to the aforementioned use of mimotopic lures defined above of formula (I) chosen from those of the following formulas:
- the invention also relates to the aforementioned use of peptide lures corresponding to recognition epitopes by the antibodies present in said proteins, the peptide sequence of which is modified by deletion, substitution, or addition of at least one amino acid, said lures being designated epitopic variants.
- the invention more particularly relates to the aforementioned use of epitopic variants of factor VIE.
- a more particular subject of the invention is also the aforementioned use of epitopic variants of factor VIE of formula (E) below:
- Xi to X 5 represent any amino acid. with the exception of the peptide of formula DDDLTDSEMDVVRFD (SEQ ID NO: 36).
- the invention relates more particularly to the aforementioned use of epitopic variants defined above of formula (E), characterized in that: Xi represents D or A,
- the invention more particularly relates to the aforementioned use of epitopic variants defined above of the following formulas:
- the invention also relates to any pharmaceutical composition characterized in that it comprises decoys as defined above, in association with pharmaceutically acceptable vehicles.
- the pharmaceutical compositions of the invention are in forms capable of being administered parenterally, or orally.
- the dosage of said pharmaceutical compositions is such that it is between approximately 1 and approximately 5 mg / kg / d of compounds of formula (I) or (E) defined above.
- the invention also relates to the peptide sequences of formula (I) as defined.
- a subject of the invention is also the peptide sequences of formula (E) as defined above.
- the invention also relates to products comprising:
- a subject of the invention is also the pseudopeptides derived from the peptide sequences of formula (I) and (E) defined above, in particular the pseudopeptides obtained by conversion of one or more, or even all of the peptides of said peptide sequences into an acid. amino D, which leads to a pseudopeptide largely more resistant to proteolysis than the initial peptide [Kramer et al., 1998, Protein Eng 11, 941-8].
- the desired polypeptide is synthesized from an insoluble support such as a benzhydrylamine or chloromethylated resin (derived from a crosslinked polystyrene, and available from suppliers in chemical products).
- an insoluble support such as a benzhydrylamine or chloromethylated resin (derived from a crosslinked polystyrene, and available from suppliers in chemical products).
- the amino acid at the C-terminal of the polypeptide to be synthesized, the ⁇ nitrogen and the reactive sites of which are protected by protective groups, is attached to the resin using widely used coupling techniques.
- the protective group for the amine function is deprotected (leaving the other protective groups, if they exist, intact) so that the next amino acid in the sequence (which also has suitable protective groups) is attached and so on.
- Suitable protective groups fluorenyl methyloxy carbonyl for alpha amino, beta or gamma tertio butyl ester groups for aspartic and glutamic acids, tertio butyl oxy carbonyl for lysine and tryptophan, trityl for cysteine, asparagine, glutamine and histidine, tertio butyl for serine and threonine, 2,2,4,6,7-pentadihydrobenzo furan for arginine.
- the lengthening of the peptide chain is carried out by successive additions of amino acids from the C-terminal to the N-terminal by esterification reaction.
- the amino functions of the residues used are temporarily protected during coupling by a labile group (a 9-fluorenylmethyloxycarbonyl or Fmoc group) which is eliminated in basic medium.
- the reactive side chains are blocked by a stable group during the synthesis phase, and deprotected at the end of assembly.
- a synthesis cycle takes place in 4 stages: firstly, the formation of a peptic bond between the NH 2 of an amino acid already deposited with the COOH of the following amino acid, which is previously activated by N-hydroxybenzotriazole and N, N diisopropylcarbodiimide.
- the unreacted free NH 2 functions are acetylated to avoid the formation of truncated peptides.
- the protective Fmoc group of the new amino acid is eliminated in basic medium by piperidine.
- the amino functions thus obtained are identified by bromophenol blue. This cycle is repeated as many times as necessary.
- the Peptides that remain covalently attached to the membrane are analyzed by an indirect colorimetric immunoassay.
- the reactivity of the peptides is evaluated by immersion of the membrane in a solution of inhibitor antibody to be tested, generally used at a concentration of 0.1-1 ⁇ g / ml. After washing, the peptide-antibody interaction is revealed by incubation of an anti-Fc antibody labeled with alkaline phosphatase used at 1: 1000 (Sigma), which in the presence of its substrate (BCEP-MTT-MgCl 2 Sigma) gives a blue precipitate at the level of the peptides which have fixed the antibody to be tested. The membranes are then regenerated to remove the blue precipitate and the bound antibody for further testing.
- Peptide ligands can be easily obtained by their ability to bind to an antibody using the phage-display technique (Smith, GP (1985) Filamentous fusion phage: novel expression vectors that display cloned antigens on the virion surface, Science. 228, 1315-7), based on the presentation of random peptides on the surface of filamentous phages. These peptides can be exposed either on the surface of the phage pIE protein (maximum number 5 copies) or on the surface of the pVEI protein (maximum number 2700 copies). These peptides, of very varied size (from 6AA to 30AA) can be either linear or constrained by a sulfur bridge.
- the biopanning technique is carried out according to the protocol described by Smith et al. above. Three selection and amplification rounds are carried out, in parallel for the pIE and pVEI banks. For each selection cycle, the various antico ⁇ s inhibitors, at a concentration of 1-5 ug / ml for the first 2 rounds, 0.1-0.5 mcg / ml for the 3 rd round, in carbonate buffer (NaHCO 3, 100 mM, pH 8.6), are adsorbed on a 10x1.5 cm Petri dish (Falcon 1029) overnight at 4 ° C with stirring.
- carbonate buffer NaHCO 3, 100 mM, pH 8.6
- TBS-T Tris Buffered Saline: NaCl 1.37 M / KC1 26.8 mM / Tris base 0.5 M-Tween 20 0.05% / pH 7
- non-sites specific are saturated for 2 h at 37 ° C with a solution of TBS-T 0.1% -BSA 3% previously filtered.
- 2.10 11 TU (transduction units) of each primary bank ie 100 times the diversity of each bank, or of phage eluate from the round previous selection are incubated overnight at 4 ° C under agitation.
- the phages not retained are eliminated by 10 washes of 2 min with 0.5% TBS-T followed by 5 washes of 2 min with 0.05% TBS-T.
- the phages selected are then eluted either by an acid elution (3 ml of 0.1 M HCl / glycine / BSA 1 mg ml previously filtered / pH 2.2, 30 min incubation at RT with shaking, then neutralization with 150 ⁇ l of Tris-HCl 2 M, pH 9) or by elution by competition with FVEI (ON incubation at 4 ° C).
- the different eluates are then used to infect E.Coli K91 cells for amplification.
- This amplification takes place in 2 stages: firstly 5 ml of a bacterial suspension in the exponential growth phase (absorbance 1.8 at 550 nm) is added to each eluate. After an incubation of 10 min at 37 ° C without shaking, 93 ml of Luria-Bertani medium (LB) with 0.2 ⁇ g / ml of tetracycline (Te) (pVEI banks) or 0.75 ⁇ g / ml of kanamycin (Ka) (pIE banks) ) are added and incubated for 30 min at 37 ° C at 225 revolutions per minute ( ⁇ ra).
- LB Luria-Bertani medium
- Te pVEI banks
- Ka kanamycin
- the concentration is then adjusted to 20 ⁇ g / ml for the Te and to 75 ⁇ g / ml for the Ka, then the suspension is incubated at 37 ° C. at 225 ⁇ m overnight. These different bacterial suspensions are then centrifuged at 4 ° C at 4000 ⁇ ra for 25 min, then at 8000 ⁇ m for 12 min, in order to precipitate the bacteria. The supernatant containing the phages is taken up in poly (ethylene glycol) 8000 / 2.5 M NaCl at a rate of 15 ml per 100 ml of supernatant; precipitation occurs overnight at 4 ° C.
- the pellet After centrifugation at 4 ° C at 8000 ⁇ m for 40 min, the pellet is taken up in 3 ml of 50 mM TBS / NaCl, and incubated at 37 ° C for 30 min at 150 ⁇ m. The content is transferred to 3 eppendorfs, centrifuged at 15,000 ⁇ m for 10 min at 4 ° C to remove cell debris, then transferred to sterile 1.5 ml vials and stored at -80 ° C.
- the quantity of amplified phages is evaluated by titration, while the enrichment in affine phages is evaluated by ELISA.
- 3 cloning stages made it possible to obtain isolated bacterial colonies on solid medium (LB-agar-Tc medium at 20 ⁇ g / ml or Ka at 75 ⁇ g / ml). The ability of the different clones to bind specifically to inhibitory antico ⁇ s is then tested by ELISA.
- Linked phages are detected using a anti-M13 antibody coupled to peroxidase (Amersham Boehringer) diluted 1: 3000, incubated for 1 h at 37 ° C. After 5 washes, the peroxidase (OPD) substrate is added. The reaction takes place for 30 min in the dark and then an absorbance measurement is made at 450 nm. After stopping the reaction by adding 4N H 2 SO 4 , a new measurement is carried out at 490 nm.
- peroxidase OPD
- the different epitopes identified in Spot or the mimotopes determined by the phage display technique are then synthesized in the form of soluble synthetic peptides thanks to an Abimed AMS422 synthesizer based on Fmoc chemistry in the soluble phase (Gausepohl, H., Boulin, C, Kraft, M. & Frank, RW (1992) Automated multiple peptide synthesis, Pept Res. 5, 315-20).
- the peptides are deprotected and cleaved from the resin by treatment with trifluoroacetic acid in the presence of suitable scavengers.
- the peptides are then lyophilized, and their purity is evaluated by HPLC. If necessary, the peptides are purified in order to obtain more than 90% homogeneity in HPLC.
- the FVEI is immobilized on the ON plate at 4 ° C.
- the inhibitor antibody is preincubated with its epitopic peptide (s) in the ON range at 4 ° C. in PBS-T0.1% -milk 2%. After 1 h of saturation with PBS-T0.1% -milk 2%, the Ac-peptide mixtures are incubated with the immobilized FVEI for 2 h at 37 ° C. Between each of these incubations, 3 washes with PBS-T0.1% are carried out except after saturation.
- the detection of the FVIE-Ac complex is obtained by a mouse or human anti-IgG coupled to peroxidase diluted to 1: 3000 incubated for 1 h at 37 ° C.
- the inhibitory nature of an antico ⁇ s is expressed in Bethesda unit, which corresponds to the reciprocal concentration of antibodies to neutralize 50% of the coagulating activity of FV I.
- the neutralizing effect of peptides will result in a return at the initial coagulation time obtained in the absence of an inhibitor.
- the monoclonal anti-FVEI antibodies are diluted in a 0.05 M imidazole buffer, pH 7.3.
- An equal volume of this preparation (250 ⁇ l) with normal plasma buffered in imidazole (0.1 M, pH 7.4) are mixed and incubated for 2 h at 37 ° C.
- normal plasma buffered in imidazole is mixed with a non-specific antibody which constitutes the control.
- the inhibitory activity of an antico ⁇ s is read from a semi-logarithmic graph representing the correlation between the residual activity of the FVEI and the inhibitory activity.
- the inhibiting antibody used at a concentration so as to obtain 50% of residual FVEI is preincubated ON at 4 ° C. in imidazole buffer with increasing concentrations of peptides. This mixture is then treated as above.
- ESH8 a mouse monoclonal antibody, hereinafter called ESH8, which exhibits a very high activity of neutralization of the procoagulant activity of FVEI (6300 Besthesda Unit / mg [Scandella et al., 1995, Blood 86, 1811-9]) .
- This antico ⁇ s is a good representative of human antico ⁇ s binding to the C2 domain of the VIE factor, * a human monoclonal antibody 2C11 (Jacquemin et al., 1998, mentioned above),
- F7B4 several mouse monoclonal antibodies, hereinafter called F7B4, F29F11, F14A12, F18B1, F19C2 and F21C1 which represent a model of human antibodies that bind to the acid region t of factor VIE for the first 3, and the acid region a 3 for the latter.
- Peptide lures of the “mimotope” type were obtained by the technique of recombinant phage banks. The approach for selecting peptides from random sequence banks has been described [Smith et al., 1993, Methods Enzymol. 217, 228-257].
- Peptides carried by filamentous phages on the surface of their envelope protein (pvm or pEI) can be used: for example, a library coding for peptides of 15 amino acids, and another coding for peptides of 12 amino acids , structurally constrained by the constant presence of two cysteine residues.
- the phage selection conditions used are those described (in particular by [Ferrieres et al., 2000, Eur. J. Biochem.
- the elution of the phages specifically captured by the antibody is carried out either by acid treatment or by displacement with an excess of antigen.
- the amino acid sequence of each selected peptide can be determined as described in particular by Ferrieres et al. For example, mimotope peptides of the antibody ESH8, as well as with the human antibody 2C11 could be obtained. Depending on the elution condition used, the consensus reasons obtained vary.
- the first of the mimotopic type comprises a single sequence YCNPSIGDKNCR, sequence represented by 3 clones
- the second group of epitopic type is distinguished by a consensus motif: XCX- hydrophobic- aromatic (Y / F) -GKTXLCX (where X represents any amino acid), which has A sequence homology with the C2 domain of factor VIE.
- Residues such as glycine (G), lysine (K), threonine (T) and leucine (L) do not tolerate any substitution, as for the hydrophobic residue, the most reactive elements are valine (V), isoleucine (I) and leucine (L), but fully accept residues such as threonine (T), methionine (M), phenylalanine (F), tryptophan (W), and tyrosine (Y).
- this position mainly tolerates phenylalanine (F), and tyrosine (Y) with a slight acceptance of tryptophan (W).
- the blocking activity of lures can be verified in vitro by ELISA test.
- the format used makes it possible to demonstrate the inhibition of the binding of the inhibitor antico ⁇ s to factor VIE by the lure introduced in increasing concentration.
- the neutralizing capacity of the lure can be confirmed in a functional test such as the Bethesda Test (Kasper method, [Kasper et al., 1975, Thromb. Diath. Haemorrh. 34, 875-6]).
- the 7 soluble mimotope peptides more particularly studied are the following:
- peptide 107 has been shown to be a relatively effective peptide in inhibiting FVEI-antico ⁇ s 2C11 binding, the inventors became interested in more detail in its ability to neutralize the inhibitory activity of 2C11.
- Fieure 2 depicts the dose-dependent neutralization of the inhibitory activity of 2C11 by the peptide 107.
- a concentration at which 98% of the activity of FVm is inhibited (FIG. 1), total neutralization of its inhibitory effect is reached with a concentration of peptide 107 of the order of 100 ⁇ M, ITC 50 being equal to 19 ⁇ M.
- a control peptide used in an identical concentration range has no neutralizing effect ( Figure 2).
- Peptide 107 incubated with FVEI alone does not modify the procoagulant activity of FVEI ( Figure 2).
- Peptides (103, 104, 105, 106, 108, and 109) can also effectively neutralize the inhibitory activity of 2C11. However, higher concentrations of peptide are necessary to achieve an efficiency similar to that of peptide 107 (data not shown).
- the neutralization properties of peptide 107 were studied in vivo, using a mouse model deficient in FVIE.
- Figure 3 shows that administration of 2C11 alone completely inhibited the procoagulant activity of the injected FVEI, while the mice which received the 2C11 antibody in the presence of peptide 107 maintain 52% of the procoagulant activity of FVEI.
- the neutralizing activity of peptide 107 is very specific since a control peptide has no neutralizing effect.
- a third step the inventors looked at whether the neutralizing properties of the peptide 107 with respect to 2C11 could also be applied to other sera from hemophiliac patients with inhibitors.
- a preliminary study reveals that out of 12 sera from hemophiliac patients with inhibitors, 2 of them react with peptide 107 thus indicating that FVIE inhibitors similar to 2C11 are produced by other patients with hemophilia A.
- FIG. 1 represents the effect of the antibody 2C11 on the activity of factor VIE evaluated by the Bethesda test.
- Factor VIE was incubated in the presence of 3.5 nM of 2C11 antibody for 2 h at 37 ° C., the residual activity of factor VIE was then measured with a coagulometer, in one step.
- the percentage of residual activity of the VIE factor is represented on the ordinate.
- Bar A represents the activity of factor VIE alone (100%)
- bar B represents activity of factor VIE in the presence of the antibody 2C11 at a concentration of 3.5 nM. In the presence of 3.5 nM of 2C11 the activity of factor VIE is almost completely inhibited.
- FIG. 2 represents the evolution of the activity of factor VIE, evaluated by the Bethesda test, in the presence of 3.5 nM of antico ⁇ s 2C11 as a function of the concentration of peptide.
- the 2C11 antibody was incubated overnight at 4 ° C in the presence of a control peptide or peptide 107 (SCHAWSNRRTCR) in variable concentration.
- the VIE factor was then incubated for 2 h at 37 ° C. with these peptide-antico ⁇ s mixtures or with peptide 107 alone, then its residual activity was measured with a coagulometer, in one step.
- the percentage of residual activity of the factor VIE is represented on the ordinate, the concentration of peptide is represented on the abscissa ( ⁇ M).
- the black triangles represent the evolution of the residual activity of factor VIE in the presence of increasing concentrations of the peptide 107 alone, the black dots represent the evolution of the residual activity of factor Vm in the presence of the mixture between increasing concentrations of the peptide 107 and the antico ⁇ s 2C11, the white diamonds represent the evolution of the residual activity of factor VIE in the presence of the mixture between increasing concentrations of the control peptide and the antibody 2C11.
- Peptide 107 neutralizes the effect of the 2C11 antibody.
- FIG. 3 represents the effect of the injection of the antico ⁇ s 2C11 in the absence or in the presence of the peptide 107 or a control peptide on the blood coagulation of mice deficient in factor VIE and to which human factor Vm is administered.
- Antico ⁇ s 2C11 (16.5 nM) or a mixture containing the antibody 2C11 (16.5 nM) and peptide 107 (650 ⁇ M) or a control peptide (700 ⁇ M) was injected into the tail vein d 'A knockout mouse, deficient in factor VIE, at a rate of 2.5 ⁇ g of 2C11 antibody, 1 mg of peptide 107 and 1 mg of control peptide. After 30 minutes, 0.5 IU of human factor VIE was injected and the plasma procoagulant activity was then measured by a chromogenic test 15 minutes later.
- the percentage of residual activity of the VIE factor is represented on the ordinate.
- Bar A represents the effect of the injection of factor VIE without prior injection of antibodies (100% "of residual activity).
- Bar B represents the effect of the injection of the 2C11 antibody alone prior to the injection of factor Vm.
- Bar C represents the effect of the injection of a mixture between the 2C11 antibody and the peptide 107 prior to the injection of factor VIE.
- Bar D represents the effect of the injection of a mixture between the 2C11 antibody and a control peptide prior to the injection of factor VIE.
- Peptide 107 specifically neutralizes the effect of the 2C11 antibody in vivo.
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Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0113360A FR2830865B1 (fr) | 2001-10-17 | 2001-10-17 | Leurres peptidiques pour la preparation de medicaments destines a la prevention ou au traitement des pathologies auto-immunes, ou des troubles lies a l'apparition d'anticorps diriges contre des proteines exogenes |
| FR0113360 | 2001-10-17 | ||
| PCT/FR2002/003557 WO2003040176A2 (fr) | 2001-10-17 | 2002-10-17 | Leurres peptidiques pour la preparation de medicaments destines a la prevention ou au traitement des pathologies auto-immunes, ou des troubles lies a l'apparition d'anticorps diriges contre des proteines exogenes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1438330A2 true EP1438330A2 (fr) | 2004-07-21 |
| EP1438330B1 EP1438330B1 (fr) | 2009-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02802664A Expired - Lifetime EP1438330B1 (fr) | 2001-10-17 | 2002-10-17 | Leurres peptidiques pour la preparation de medicaments destines a la prevention ou au traitement des pathologies auto-immunes, ou des troubles lies a l'apparition d'anticorps diriges contre des proteines exogenes |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7632817B2 (fr) |
| EP (1) | EP1438330B1 (fr) |
| JP (1) | JP2005515177A (fr) |
| AT (1) | ATE452139T1 (fr) |
| AU (1) | AU2002363386B2 (fr) |
| CA (1) | CA2463745A1 (fr) |
| DE (1) | DE60234786D1 (fr) |
| FR (1) | FR2830865B1 (fr) |
| WO (1) | WO2003040176A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009117409A2 (fr) * | 2008-03-18 | 2009-09-24 | Merck & Co., Inc. | Procédé très efficace servant à déterminer l'interaction de protéines |
| TWI573806B (zh) * | 2008-04-17 | 2017-03-11 | 巴克斯歐塔公司 | 生物活性胜肽 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2473388A (en) * | 1987-11-16 | 1989-06-22 | Scripps Clinic And Research Foundation | Treatment of factor viii inhibitors |
| US5187155A (en) * | 1989-06-23 | 1993-02-16 | Board Of Regents, The University Of Texas System | Anticoagulant peptides |
| US6180371B1 (en) * | 1996-06-26 | 2001-01-30 | Emory University | Modified factor VIII |
| BE1008491A3 (fr) * | 1994-07-14 | 1996-05-07 | Croix Rouge De Belgique Depart | Sequence polypeptidique antigenique du facteur viii, fragments et/ou epitopes de celle-ci. |
| US5846933A (en) * | 1996-06-28 | 1998-12-08 | Korngold; Robert | CD-4 derived peptides that inhibit immune responses |
| GB9805913D0 (en) * | 1998-03-19 | 1998-05-13 | Kings College University Of Lo | Diagnosis of ms |
| JP2001504709A (ja) | 1997-01-31 | 2001-04-10 | ヒューマン ジノーム サイエンシーズ,インコーポレイテッド | 組織因子経路インヒビター3 |
| US6043220A (en) * | 1997-12-03 | 2000-03-28 | Intrabiotics Pharmaceuticals, Inc. | Threonine-containing protegrins |
| EP1037663A2 (fr) * | 1997-12-16 | 2000-09-27 | Regents Of The University Of Minnesota | Procedes permettant de traiter des reponses immunitaires indesirables |
| US6197526B1 (en) * | 1999-01-04 | 2001-03-06 | Dyax Corp. | Polypeptides for binding human factor VIII and fragments of human factor VIII |
-
2001
- 2001-10-17 FR FR0113360A patent/FR2830865B1/fr not_active Expired - Fee Related
-
2002
- 2002-10-17 JP JP2003542221A patent/JP2005515177A/ja active Pending
- 2002-10-17 EP EP02802664A patent/EP1438330B1/fr not_active Expired - Lifetime
- 2002-10-17 WO PCT/FR2002/003557 patent/WO2003040176A2/fr not_active Ceased
- 2002-10-17 AT AT02802664T patent/ATE452139T1/de not_active IP Right Cessation
- 2002-10-17 US US10/492,929 patent/US7632817B2/en not_active Expired - Fee Related
- 2002-10-17 DE DE60234786T patent/DE60234786D1/de not_active Expired - Lifetime
- 2002-10-17 CA CA002463745A patent/CA2463745A1/fr not_active Abandoned
- 2002-10-17 AU AU2002363386A patent/AU2002363386B2/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03040176A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2002363386B2 (en) | 2009-01-08 |
| ATE452139T1 (de) | 2010-01-15 |
| US20050124544A1 (en) | 2005-06-09 |
| DE60234786D1 (de) | 2010-01-28 |
| FR2830865B1 (fr) | 2004-10-22 |
| CA2463745A1 (fr) | 2003-05-15 |
| JP2005515177A (ja) | 2005-05-26 |
| US7632817B2 (en) | 2009-12-15 |
| EP1438330B1 (fr) | 2009-12-16 |
| WO2003040176A2 (fr) | 2003-05-15 |
| WO2003040176A3 (fr) | 2004-04-22 |
| FR2830865A1 (fr) | 2003-04-18 |
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